LLDB doesn't correlate my frame with source code.

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AndrewAPrice
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LLDB doesn't correlate my frame with source code.

Post by AndrewAPrice »

Hello, I have an corp dump of a crashed program in my OS. (I'm forcing the crash, so I know what it is. I want help debugging getting lldb to work.)

I load the core dump into lldb via:

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target create --core "temp/CoreDumps/Dump1.dmp" "temp/Perception-debug/Applications/Storage Manager/Storage Manager.app"
No errors.

When I type "bt", it prints just the raw addresses, no code references or symbols:

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* thread #1, name = 'Storage Manager', stop reason = signal SIGSTOP
  * frame #0: 0x00000000002342fa
    frame #1: 0x0000000000235b4f
    frame #2: 0x0000000000234cfb
    frame #3: 0x0000000000291d53
    frame #4: 0x0000000000290122
    frame #5: 0x000000000028feaf
    frame #6: 0x000000000028ce22
    frame #7: 0x0000000000289396
    frame #8: 0x000000000000a360
But the symbols have loaded, because if I type "image lookup -va $pc" I get the exact line of code and the parameters to the C++ method:

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      Address: Storage Manager.app[0x00000000002342fa] (Storage Manager.app.PT_LOAD[1]..text + 14506)
      Summary: Storage Manager.app`MemoryMappedFile::MemoryMappedFile(std::_LIBCPP_ABI_NAMESPACE::unique_ptr<File, std::_LIBCPP_ABI_NAMESPACE::default_delete<File>>, unsigned long, unsigned long, unsigned long) + 154 at memory_mapped_file.cc:58:12
       Module: file = "/Users/andrewaprice/Documents/GitHub/Perception/Build/temp/Perception-debug/Applications/Storage Manager/Storage Manager.app", arch = "x86_64"
  CompileUnit: id = {0x00000003}, file = "/Users/andrewaprice/Documents/GitHub/Perception/Applications/Storage Manager/source/memory_mapped_file.cc", language = "c++14"
     Function: id = {0x00031fe9}, name = "MemoryMappedFile::MemoryMappedFile(std::_LIBCPP_ABI_NAMESPACE::unique_ptr<File, std::_LIBCPP_ABI_NAMESPACE::default_delete<File>>, unsigned long, unsigned long, unsigned long)", mangled = "_ZN16MemoryMappedFileC2ENSt21_LIBCPP_ABI_NAMESPACE10unique_ptrI4FileNS0_14default_deleteIS2_EEEEmmm", range = [0x0000000000234260-0x000000000023445b)
     FuncType: id = {0x00031fe9}, byte-size = 0, decl = memory_mapped_file.h:24, compiler_type = "void (class std::unique_ptr<class File>, size_t, size_t, perception::ProcessId)"
       Blocks: id = {0x00031fe9}, range = [0x00234260-0x0023445b)
               id = {0x0003211b}, ranges = [0x002342f3-0x002343ea)[0x002343fe-0x0023441e)
    LineEntry: [0x00000000002342f3-0x0000000000234300): /Users/andrewaprice/Documents/GitHub/Perception/Applications/Storage Manager/source/memory_mapped_file.cc:58:12
       Symbol: id = {0x00000b9c}, range = [0x0000000000234260-0x000000000023445b), name="MemoryMappedFile::MemoryMappedFile(std::_LIBCPP_ABI_NAMESPACE::unique_ptr<File, std::_LIBCPP_ABI_NAMESPACE::default_delete<File>>, unsigned long, unsigned long, unsigned long)", mangled="_ZN16MemoryMappedFileC2ENSt21_LIBCPP_ABI_NAMESPACE10unique_ptrI4FileNS0_14default_deleteIS2_EEEEmmm"
     Variable: id = {0x0003211e}, name = "grant_request", type = "GrantStorageDevicePermissionToAllocateSharedMemoryPagesRequest", valid ranges = <block>, location = DW_OP_fbreg -160, decl = memory_mapped_file.cc:71
     Variable: id = {0x0003201e}, name = "this", type = "MemoryMappedFile *", valid ranges = <block>, location = [0x0000000000234285, 0x00000000002343ef) -> DW_OP_reg3 RBX, decl = 
     Variable: id = {0x00032026}, name = "file", type = "unique_ptr<File, std::_LIBCPP_ABI_NAMESPACE::default_delete<File> >", valid ranges = <block>, location = [0x0000000000234285, 0x00000000002343f3) -> DW_OP_breg13 R13+0, decl = memory_mapped_file.cc:46
     Variable: id = {0x00032031}, name = "length_of_file", type = "size_t", valid ranges = <block>, location = [0x0000000000234285, 0x000000000023433d) -> DW_OP_reg15 R15, decl = memory_mapped_file.cc:47
     Variable: id = {0x0003203c}, name = "optimal_operation_size", type = "size_t", valid ranges = <block>, location = [0x0000000000234285, 0x0000000000234316) -> DW_OP_reg12 R12, decl = memory_mapped_file.cc:48
     Variable: id = {0x00032047}, name = "allowed_process", type = "perception::ProcessId", valid ranges = <block>, location = [0x00000000002342f3, 0x000000000023445b) -> DW_OP_entry_value(DW_OP_reg8 R8), DW_OP_stack_value, decl = memory_mapped_file.cc:49
"frame info" returns very little detail:

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frame #0: 0x00000000002342fa
"frame variable" returns nothing.

If I call "frame select" (e.g. "frame select 1") I get this output:

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frame #1: 0x0000000000235b4f
error: 0xffffffffffffffff can't be resolved
What does 0xffffffffffffffff mean?

My registers with "register read -all" look sane:

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General Purpose Registers:
       rax = 0x000000000000000a
       rbx = 0x0000000000025430
       rcx = 0x000000000028cff6
       rdx = 0x0000000000000000
       rdi = 0x0000000000000020
       rsi = 0x0000000000656c69
       rbp = 0x0000000000013bb0
       rsp = 0x0000000000013b10
        r8 = 0x0000000000000000
        r9 = 0x0000000000000000
       r10 = 0x0000000000000000
       r11 = 0x0000000000200246
       r12 = 0x0000000000200000
       r13 = 0x0000000000013bd0
       r14 = 0x0000000000025458
       r15 = 0x0000000000b19b78
       rip = 0x00000000002342fa
    rflags = 0x0000000000200246
        cs = 0x0000000000000023
        fs = 0x0000000000000010
        gs = 0x0000000000000010
        ss = 0x000000000000001b
   fs_base = 0x0000000000000000
   gs_base = 0x0000000000000000
        ds = 0x000000000000001b
        es = 0x000000000000001b
       eax = 0x0000000a
       ebx = 0x00025430
       ecx = 0x0028cff6
       edx = 0x00000000
       edi = 0x00000020
       esi = 0x00656c69
       ebp = 0x00013bb0
       esp = 0x00013b10
       r8d = 0x00000000
       r9d = 0x00000000
      r10d = 0x00000000
      r11d = 0x00200246
      r12d = 0x00200000
      r13d = 0x00013bd0
      r14d = 0x00025458
      r15d = 0x00b19b78
        ax = 0x000a
        bx = 0x5430
        cx = 0xcff6
        dx = 0x0000
        di = 0x0020
        si = 0x6c69
        bp = 0x3bb0
        sp = 0x3b10
       r8w = 0x0000
       r9w = 0x0000
      r10w = 0x0000
      r11w = 0x0246
      r12w = 0x0000
      r13w = 0x3bd0
      r14w = 0x5458
      r15w = 0x9b78
        ah = 0x00
        bh = 0x54
        ch = 0xcf
        dh = 0x00
        al = 0x0a
        bl = 0x30
        cl = 0xf6
        dl = 0x00
       dil = 0x20
       sil = 0x69
       bpl = 0xb0
       spl = 0x10
       r8l = 0x00
       r9l = 0x00
      r10l = 0x00
      r11l = 0x46
      r12l = 0x00
      r13l = 0xd0
      r14l = 0x58
      r15l = 0x78

Floating Point Registers:
     fctrl = 0x0000
     fstat = 0x0000
      ftag = 0x0000
       fop = 0x0000
     fiseg = 0x00000000
     fioff = 0x00000000
       fip = 0x0000000000000000
     foseg = 0x00000000
     fooff = 0x00000000
       fdp = 0x0000000000000000
     mxcsr = 0x00000000
  mxcsrmask = 0x0000ffff
       st0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       st7 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
       mm0 = 0x0000000000000000
       mm1 = 0x0000000000000000
       mm2 = 0x0000000000000000
       mm3 = 0x0000000000000000
       mm4 = 0x0000000000000000
       mm5 = 0x0000000000000000
       mm6 = 0x0000000000000000
       mm7 = 0x0000000000000000
      xmm0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm7 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm8 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
      xmm9 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm10 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm11 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm12 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm13 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm14 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     xmm15 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}

Advanced Vector Extensions:
16 registers were unavailable.
So.. the symbols are loaded and I can query them via "image lookup", but for some reason lldb doesn't think my frame addresses correlate with these symbols?

This is my code that creates and dumps the core-dump: https://github.com/AndrewAPrice/Percept ... re_dump.cc

My binaries are elf-x86_64, and the program is linked with lld (llvm's linker) with the following arguments: "-g -nostdlib --gc-sections -z max-page-size=1". I've tried removing "--gc-sections" and it hasn't helped.

Does anybody have advice on how I can debug this?
My OS is Perception.
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